// C++ informative line for the emacs editor: -*- C++ -*-
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#ifndef __H5File_H
#define __H5File_H

namespace H5 {

/*! \class H5File
    \brief Class H5File represents an HDF5 file and inherits from class Group
    as file is a root group.
*/
//  Inheritance: Group -> CommonFG/H5Object -> H5Location -> IdComponent
class H5_DLLCPP H5File : public Group {
   public:
        // Creates or opens an HDF5 file.
        H5File(const char* name, unsigned int flags,
           const FileCreatPropList& create_plist = FileCreatPropList::DEFAULT,
           const FileAccPropList& access_plist = FileAccPropList::DEFAULT);
        H5File(const H5std_string& name, unsigned int flags,
           const FileCreatPropList& create_plist = FileCreatPropList::DEFAULT,
           const FileAccPropList& access_plist = FileAccPropList::DEFAULT);

        // Open the file
        void openFile(const H5std_string& name, unsigned int flags,
            const FileAccPropList& access_plist = FileAccPropList::DEFAULT);
        void openFile(const char* name, unsigned int flags,
            const FileAccPropList& access_plist = FileAccPropList::DEFAULT);

        // Close this file.
        virtual void close();

        // Gets a copy of the access property list of this file.
        FileAccPropList getAccessPlist() const;

        // Gets a copy of the creation property list of this file.
        FileCreatPropList getCreatePlist() const;

        // Gets general information about this file.
        void getFileInfo(H5F_info2_t& file_info) const;

        // Returns the amount of free space in the file.
        hssize_t getFreeSpace() const;

        // Returns the number of opened object IDs (files, datasets, groups
        // and datatypes) in the same file.
        ssize_t getObjCount(unsigned types = H5F_OBJ_ALL) const;

        // Retrieves a list of opened object IDs (files, datasets, groups
        // and datatypes) in the same file.
        void getObjIDs(unsigned types, size_t max_objs, hid_t *oid_list) const;

        // Returns the pointer to the file handle of the low-level file driver.
        void getVFDHandle(void **file_handle) const;
        void getVFDHandle(const FileAccPropList& fapl, void **file_handle) const;
        //void getVFDHandle(FileAccPropList& fapl, void **file_handle) const; // removed from 1.8.18 and 1.10.1

        // Returns the file size of the HDF5 file.
        hsize_t getFileSize() const;

        // Returns the 'file number' of the HDF5 file.
        unsigned long getFileNum() const;

        // Determines if a file, specified by its name, is in HDF5 format
        static bool isHdf5(const char* name);
        static bool isHdf5(const H5std_string& name);

        // Determines if a file, specified by its name, can be accessed as HDF5
        static bool isAccessible(const char* name, const FileAccPropList& access_plist = FileAccPropList::DEFAULT);
        static bool isAccessible(const H5std_string& name, const FileAccPropList& access_plist = FileAccPropList::DEFAULT);

        // Reopens this file.
        void reOpen();  // added for better name

#ifndef DOXYGEN_SHOULD_SKIP_THIS
        void reopen();  // obsolete in favor of reOpen()

        // Creates an H5File using an existing file id.  Not recommended
        // in applications.
        H5File(hid_t existing_id);

#endif // DOXYGEN_SHOULD_SKIP_THIS

        ///\brief Returns this class name.
        virtual H5std_string fromClass () const { return("H5File"); }

        // Throw file exception.
        virtual void throwException(const H5std_string& func_name, const H5std_string& msg) const;

        // For CommonFG to get the file id.
        virtual hid_t getLocId() const;

        // Default constructor
        H5File();

        // Copy constructor: same as the original H5File.
        H5File(const H5File& original);

        // Gets the HDF5 file id.
        virtual hid_t getId() const;

        // H5File destructor.
        virtual ~H5File();

   protected:
#ifndef DOXYGEN_SHOULD_SKIP_THIS
        // Sets the HDF5 file id.
        virtual void p_setId(const hid_t new_id);
#endif // DOXYGEN_SHOULD_SKIP_THIS

   private:
        hid_t id;  // HDF5 file id

        // This function is private and contains common code between the
        // constructors taking a string or a char*
        void p_get_file(const char* name, unsigned int flags, const FileCreatPropList& create_plist, const FileAccPropList& access_plist);

}; // end of H5File
} // namespace H5

#endif // __H5File_H

